Features:
Spring test probes are necessary parts for PCB testing to access components on printed circuit assemblies.
There are total 100Pcs spring test probes in one set that you can use for a long time.
Cone shape head can be used for testing through-hole components.
Widely used for testing PCB gold fingers(edge connectors) and pads. 
They are great replacement probes if you need to change broken or old test probes. 

Specification:
P75-E2:
head Shape: Cone
Current Rating: 3A
Resistance: 50mΩ
Stroke: 6.5mm
head Diameter: 1.5mm
Probe Tube Diameter: 1.36mm
Probe Rod Diameter: 0.99mm
Probe Length: 33.3mm
Boring Size: 1.7mm
Min. Test Interval: 2.54mm
Quantity: 100pcs

P50-J1:
head Shape: Round
Current Rating: 3A
Resistance: 50mΩ
Stroke: 2.6mm
Probe Tube Diameter: 0.68mm
Probe Rod Diameter: 0.48mm
Probe Length: 16mm
Boring Size: 0.9mm
Min. Test Interval: 1.27mm
Quantity: 100pcs 

P100-E2:
head Shape: Cone
Current Rating: 3A
Resistance: 50mΩ
Stroke: 6.5mm
head Diameter: 1.5mm
Probe Tube Diameter: 1.36mm
Probe Rod Diameter: 0.99mm
Probe Length: 33.3mm
Boring Size: 1.7mm
Min. Test Interval: 2.54mm
Quantity: 100pcs 

P50-B1:
P50-B1 - 16mm
Pin Centre: 0.68mm
Min test distance: 1.27mm
Spring Pressure: 75g
Full Stroke: 2.65mm
Current Rating: 3A
Current Resistance: 50mm
Plunger: Heat Treated Beryllium Copper
Barrel: Phosphor Bronze . Gold Plated
Spring: stainless steel

P75-B1:
Specification:spring thimble
Needle tube diameter: 1.02mm
Needle bar diameter:0.74mm
Pin Total Length: 15.8mm
Drill size: 1.4mm;
Minimum distance between test: 1.91mm

Package Included:
100 x Probes